I'm certain that can be done but I suspect it would have to be ROM specific. I'm not sure what file in the ROM sets defaults for stuff like that but it's probably a monolithic thing like the Windows Registry where you can't replace just one or two items in it without overwriting the whole file.
Registry's not the best example, because of course you can make specific changes to it with regedit.exe, but that requires a fully running and loaded OS, which you don't have in recovery, which is where you'd be making this kind of update happen. Simply put, I doubt it can be done, at least not easily or safely.
T-Mobile MyTouch 4G Slide Khaki
Not expecting CM10 to work (*being a non-Sense ROM) but will try it now that it's out. Otherwise, it's back to Bulletproof.
Don't gripe about people not using search when you quote 5 paragraphs to reply with 1 or 2 lines of text. It's hard enough finding one or two words you search for when they're sandwiched between page-long quotes and sig pics of your speedtest nobody cares about.